James Gunn casting Michael Rosenbaum in Superman reboot has surprised fans, as the actor known for portraying Lex Luthor on Smallville joins the new film in an unexpected way. During a recent appearance at Fan Expo Dallas, Rosenbaum revealed he will deliver a brief voice performance in Gunn’s much-anticipated Superman movie, prompting intrigue and speculation about the nature of his role.
Michael Rosenbaum’s Surprise Involvement in the Superman Reboot
Fans of Michael Rosenbaum, best remembered for his turn as Lex Luthor, were eager to hear details after he publicly discussed his involvement with the new Superman film. Rather than returning to the screen in a prominent role, Rosenbaum disclosed that his participation would be more subtle, limited to a voice part rather than an on-camera appearance.
“James asked me to do something fun, so I have a couple of lines that I voice,”
Rosenbaum shared, offering insight into how his connection with Gunn led to this opportunity. —Michael Rosenbaum, Actor
He went on to elaborate about Gunn’s influence and openness to collaboration as the head of DC Studios.
“There was nothing in this one, but he’s the head of DC, so I think he can stick me in a movie or something.”
—Michael Rosenbaum, Actor
The Mystery of Rosenbaum’s Role
The specifics of Rosenbaum’s part remain undisclosed, but the actor indicated it might be a brief but entertaining contribution. It is suspected that he could be voicing one of the robot companions found in Superman’s Fortress of Solitude, joining an impressive vocal roster that already includes Alan Tudyk and Michael Rooker, both confirmed by Gunn for similar roles.
A History of Collaboration and Friendship
Rosenbaum’s connection to Gunn goes beyond this latest film. He gained recognition for voicing Wally West’s Flash in the Justice League animated series and later brought Martinex to life in all three Guardians of the Galaxy movies, showing his versatility and long-standing association with Gunn. Their friendship is well documented, and with Gunn in charge at DC, it feels natural that he would invite Rosenbaum to contribute, albeit in a small way for now.
When questioned about his limited role, Rosenbaum recounted his own curiosity:
“Why am I not in Superman? Why am I not in the movie somehow?”
—Michael Rosenbaum, Actor
Despite not scoring a bigger part, Rosenbaum’s attitude reflected understanding and openness to future projects.
“Whatever comes to me, I look at it, and if it’s not too silly, or if it makes me laugh, or I think I could do a really good job, or I think I can make an impression, I’ll do it.”
—Michael Rosenbaum, Actor
Looking Ahead: The Legacy of Superman and Rosenbaum’s Role
The new Superman film, set for release on July 11, 2025—which happens to coincide with Rosenbaum’s birthday—serves as a meaningful collaboration between friends.
“He’s one of my best friends, and he’s very loyal. I think he’s got a great vision,”
Rosenbaum said of Gunn, underlining the trust and creative spirit that mark their professional relationship. —Michael Rosenbaum, Actor
The announcement has also received praise from Tom Welling, who played Clark Kent in Smallville, reflecting the lasting impact of Rosenbaum’s presence:
“Once (Michael) gets involved, it’s better.”
—Tom Welling, Actor
With James Gunn at the helm, fans can expect a blend of fresh perspectives and familiar faces. While Rosenbaum’s role may be limited this time, his participation hints at a continued partnership, sparking anticipation for possible future collaborations in the DC Universe.
